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2399233
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Patent number 2,399,233
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Issue date Apr 30, 1946
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C03 - GLASS MINERAL OR SLAG WOOL
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2399232
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Patent number 2,399,232
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Issue date Apr 30, 1946
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C03 - GLASS MINERAL OR SLAG WOOL
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2343908
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Patent number 2,343,908
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Issue date Mar 14, 1944
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C01 - INORGANIC CHEMISTRY
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2341242
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Patent number 2,341,242
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Issue date Feb 8, 1944
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C03 - GLASS MINERAL OR SLAG WOOL
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2338439
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Patent number 2,338,439
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Issue date Jan 4, 1944
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C03 - GLASS MINERAL OR SLAG WOOL
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2147202
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Patent number 2,147,202
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Issue date Feb 14, 1939
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C03 - GLASS MINERAL OR SLAG WOOL
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2102630
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Patent number 2,102,630
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Issue date Dec 21, 1937
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C03 - GLASS MINERAL OR SLAG WOOL
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1713394
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Patent number 1,713,394
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Issue date May 14, 1929
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C03 - GLASS MINERAL OR SLAG WOOL